期待了好久,ST昨天(2017年5月16日)终于在西安举办了第一届线下培训,这次培训的主题是“STM32低功耗设计应用Workshop”。
9 r$ g! n6 p% Y/ G6 ^ 用ST的芯片已经有好几年的历史了,但是我之前一直用的是STM32F1和STM32F4,STM8S系列的产品,对于低功耗的产品之前还真没有怎么太多的接触,有幸能参与此次培训,感觉一整天收获颇丰,感觉花了一天时间把低功耗设计的一些大概的东西掌握了,这个学习效率还是蛮高的。所以将自己学习到的东西总结分享给大家,如果有理解不到位的地方,还望各位大神指点一二,以促进我们共同成长。1 N( I6 P* x- r5 D6 n& f5 r6 U
全天培训是在咖啡厅进行的,课堂上时时飘来可口的饭香味,整体氛围很好。
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1 [- a" K: [) | B 作为一个技术狗,我直接跳过ST关于产品线的介绍,直接杀入主题--基于STM32L476的低功耗设计,当然在这之前先介绍几个ST发布发布的非常好用的工具。
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3 t' R4 l3 |* H" G" W- L3 ? 一、ST MCU Finder$ J0 F, E' a) ^7 |, `6 T* r
这个软件我最早是在苹果软件商店发现的,下载下来觉得挺好用,所以还推荐给我群里的人了,后来又发布了安卓版本和PC桌面版(包含WINDOWS\LINUX\MAC OS)作为一个ST的忠实粉丝,我也是第一时间下载使用并推荐给群里的人。也在摩尔吧开过一次直播,和大家探讨基于ST MCU Finder 和cube MX以及keil进行产品快捷开发的课题,链接为:https://www.moore8.com/courses/1444。当然,啰嗦了这么多,还是没有给大家说说这个软件是干嘛的,我直接上图
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上面的是图标,下面是软件打开后界面:
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这简直就是一个选型利器啊,我们可以根据自己的需求,选择合适的检索方式,然后可以快速找到适合自己的芯片了啦。找到芯片之后还可以快速下载数据手册和其他的文档。再也不用网上到处找文档了。/ c# A, e; k' W& S1 j3 `7 h
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二、STM32CubeMX- ^* o& Y" b6 L6 P R5 Y% h0 M
这又是一件利器,它可以方便的查看芯片的IO管脚图,时钟树等,不只是可以看,而且可以配合,是一款很好的IO分配,时钟树配置软件,而且它可以进行电源功耗计算。其实最厉害的应该是代码自动生成。* Q: O$ S4 Y. E; a1 ]+ e v
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上面是STM32CubeMX的图标,下面是使用的详图:
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以STM32L476 nucleo板子为例,创建一个项目9 C9 c2 P. \) C# W& b- D
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& R7 \- {& ?% F3 B$ X0 m' Z/ y具体功能大家看图,下载软件使用一下就爽翻了,我就不详细描述了。
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4 y) U$ a. ~& p; A& u 三:常用的网站及公众号:
0 O8 g7 X; ^. F& N7 d9 u, \ STM32社区:https://www.stmcu.org.cn/' W3 y& m' }) P3 N8 ^
STM32中文官网:http://www.stmcu.com.cn1 g8 `0 H* O- }3 H" }) I
STM32四轴飞行器教程:https://www.moore8.com/courses/course/1308; q/ ^2 r2 \ \, B0 t
公众号:STM32单片机, Q+ W& v" r8 d8 ^
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; a7 _( J/ p8 ^( u1 A) V 安利完上面两个软件,开始正式总结回忆低功耗课程的内容:$ v; h$ p9 F( @6 ]) s4 k. \
1、在低功耗案例分享中学习到的东西有以下几点:
$ \$ B( S1 U5 L1 u5 k; P5 C8 ] #、影响低功耗设计的几个因素:
+ `% T$ y6 t. @& `+ n *芯片的工艺和制程:不同的制程芯片内部晶体管的开关功耗不同,导致整个芯片功耗不同5 X. X+ x# {/ |6 p3 c+ W7 e
*晶体管数量不同:这个是显而易见的一个因素! n5 Z( }7 v% i# L
*模拟外设的使用:模拟外设相对耗电量比较大
8 z! @& b6 l$ L" b* u S, i *RAM与Falsh大小:不同的存储容量耗电也不一样,存储功耗近似和存储空间大小成正比
! f: P$ G2 l0 ]2 z6 I. _- ` *MCU供电特性:提供的电压越低,功耗也就越低,但是此时频率也越低,和电脑超频耗电量大一个道理
) a+ d/ I' X5 g* l# l *时钟频率:时钟频率越高,耗电量越大
$ _& O2 M5 c6 l. h" u *工作模式:不同的工作模式耗电量不同,这个是显而易见的5 ^0 b$ y3 r7 N( \2 x
#、功耗分为静态功耗和动态功耗,动态功耗与电压、频率、负载等关系相关/ B4 O6 Y7 G( U" K3 S/ @
#、L4系列独有的电压转换器,可调时钟源,SMPS等.7 x0 L9 O8 N6 E" l% U9 n
#、外设和GPIO连接的时候,如果两端电压不一致,就会导致电流产生,从而消耗功耗,所以要仔细阅读外设手册并进行合理配置
- }4 ~+ a% N; f+ o! _7 w5 Y #、IIC等外设的管脚必须外加强上拉,在进入低功耗之前把IIC的管脚设置为上拉输入模式" W, a* I* l# i! {
#、中断标识未清除也可能导致功耗上升( \9 Q( R+ J. \% Y. q8 j2 y7 N
#、虚焊等其他情况也可能导致功耗异常1 h3 u0 R: o$ V% K L$ \( T8 s
#、在数据传输未结束的时候,尽量不要切换到低功耗模式,可能会失败0 q- m; K9 g3 w3 W1 j; s
#、使用低功耗串口唤醒系统的时候,如果串口波特率太高可能导致前面的数据丢失
/ f; f9 L: @0 s" f4 l+ D" G& [3 ] #、一些特殊场景可以考虑把代码优先级修改为速度优先,用空间换时间
; P3 n/ ]0 j. b: }/ \ { 2、HandsOn环节的实验学习(具体实验安排我就不说了,请参考ppt):2 T# }6 K5 `/ f3 k8 ]
代码如下:. j5 x- ]+ q( I5 }# ~
- /* Includes ------------------------------------------------------------------*/
8 p: ~; O: w1 @ - #include "main.h"
8 R! ^& y; c2 B3 H; @ - #include "stm32l4xx_hal.h"
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$ }1 W0 [$ ]+ {- /* USER CODE BEGIN Includes */7 F) n5 R+ b0 [5 j- C$ J8 D
- #include <stdio.h>
, Z" @ e) n1 B6 _+ l* F - #include "string.h"; ]' ~! A* U( t1 X- t4 `- t8 w
- 2 l+ S9 @+ v& M+ j( n N' R
- #ifdef __GNUC__
# Q+ B1 I+ Z. M' g$ y/ t - /* With GCC, small printf (option LD Linker->Libraries->Small printf
2 T9 Y" {0 g; j1 D - set to 'Yes') calls __io_putchar() */
3 \2 Q/ s Y) u. s. A - #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
- ]" B! H- Z' P/ g! E( x - #else, A. Z! p. T: @7 w% \, l) Q' K, e# n
- #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)0 ?' X2 f5 W$ u& ?3 Q2 p
- #endif /* __GNUC__ *// Q; h* d4 ?2 M# y% p: k, t
# b O1 u6 w. l; R7 p" d7 _+ z- /* USER CODE END Includes */ q: ^. v* Q3 o% B( r
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- /* Private variables ---------------------------------------------------------*/
9 I5 ~: L1 ~" r# w - UART_HandleTypeDef huart2;( k8 Z7 O2 C. ~- l* S
- , p" V# [) ~1 ~3 |1 `+ h
- /* USER CODE BEGIN PV */
/ f6 O. n; z- g! I% k( C - /* Private variables ---------------------------------------------------------*/) ]# {+ g$ |* r9 j* h% q% i
- __IO uint8_t ReceiveStatus = 0;
! n3 ^: w9 n& ?# o( z - __IO uint16_t RxCmdCounter = 0;* B5 `8 T2 `$ b$ T6 N* z% }* H/ ^
- __IO uint8_t ReadyToReception = 0;7 f5 t4 {) |) |2 |1 `' ]# a
- __IO uint8_t CmdEnteredOk = 0;
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- #define LR_ASCII_VALUE ((uint8_t)0x0A)
/ `. h1 R! Y G - #define CR_ASCII_VALUE ((uint8_t)0x0D)
& w: {* f! q" ^4 k* Q$ J - #define RXCOMMANDSIZE 0x20* _$ G( Y# P* o" e% b8 G& A
- #define RXBUFFERSIZE 0x018 c) f1 c$ j6 J2 I3 H. {9 {: s
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) n9 k6 Y& k; }# ~1 X- char RxCommand[RXCOMMANDSIZE];
; m/ o! t( W8 u5 b1 p# V3 ] - uint8_t RxBuffer[RXBUFFERSIZE] = {0}; //transmitting byte per byte: ?( t8 u7 ]* m: i
/ v$ m0 w) Z3 e& E1 f- char temp; //initialisation character' T% ]& l6 w7 D2 p3 w% ^
- char * s;
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- /* USER CODE END PV */0 X$ y9 I: {' ]
- 1 r9 T: f7 h5 v
- /* Private function prototypes -----------------------------------------------*/ N. M' J9 D5 I. t4 D/ Q C
- void SystemClock_Config(void);0 I( X e- a' @* a/ B+ v) k( W
- void Error_Handler(void);8 ]! ?! L$ n; y4 O# C' E8 p
- static void MX_GPIO_Init(void);3 x% s+ A: n) T6 ^. C* [& D
- static void MX_USART2_UART_Init(void);3 m# j. }& O3 i* c1 S
- ) |7 ~' Q# Z b+ \
- /* USER CODE BEGIN PFP */. J1 F9 Z" X# d% L. N
- /* Private function prototypes -----------------------------------------------*/( f5 S; \7 \/ c% q. s- L
- void DecodeReception(void);& u2 O; d! k/ o$ i- ?: v& {
- void LSE_OFF_Config(void);
, k* k1 d6 T. Y9 Y: A - extern void test_shutdown(void);
$ C/ M& u$ e' G" l( o7 g6 a - extern void test_standby(void);
* U& A$ \* L4 W& F7 b. e& P$ q - extern void test_lpsleep_2mhz(void);/ j6 N5 M2 B* \$ M- f4 |, S0 B5 {
- extern void test_stop2(void);' p1 E3 {* u* ?, ]
- /* USER CODE END PFP */
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$ y& l3 J f) G- /* USER CODE BEGIN 0 */# A. D: R6 z2 G _& _7 Z' a: `9 d. T
- & i; [+ X& I4 m& [( w
- /* USER CODE END 0 */
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1 i, O5 W; L% H# z7 R- int main(void)
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9 i4 i! l: T0 S$ L7 Z- /* USER CODE BEGIN 1 */2 X7 @( V& r4 \0 b) k
- ( R; P+ |5 H7 L0 i, e% a+ [; F8 Z
- /* USER CODE END 1 */
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- /* MCU Configuration----------------------------------------------------------*/
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i3 W3 |) J; u9 E- /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
: X- {4 Q: K$ U! w3 i - HAL_Init();
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* s i0 I! E* D% y/ g2 M6 B0 F; d: K- /* Configure the system clock */
. P( b1 D1 g3 O- n - SystemClock_Config();
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- /* Initialize all configured peripherals */
: h$ p% _; c' U' o" q - MX_GPIO_Init();
' l8 a' j( N- v; G5 j - MX_USART2_UART_Init();4 i0 V+ S6 i% H9 H1 ^
# F) Z7 X. \! G( H# f- /* USER CODE BEGIN 2 */* H( l/ \0 @8 d3 c' E
- 3 e/ s# h4 d- B: q% x8 d3 j
- HAL_Delay(1000);//delay 1s
2 v* ^: k: ^! z, f7 ^/ F' z4 r - $ f" {" v) |4 E# f4 U
- /* Output a message on Hyperterminal using printf function */
$ a# M4 _$ v$ J! k5 Z$ t - printf("\n\rREADY\n\r");7 |/ O. l' e8 ? S8 C: I' q
- printf("Please enter the test number according below options\n\r");9 f# l& q) W0 x0 T! R" W
- printf(" 0 (SHUTDOWN) \n\r"); ( C7 ?) a0 @1 c/ J" B0 b3 g
- printf(" 1 (STANDBY) \n\r");# S9 F/ }0 J, _; l
- printf(" 2 (STOP2) \n\r");
8 k1 q; h7 D3 _) ?! }1 t9 w! D - printf(" 3 (LPSLEEP 2MHz - FLASH OFF) \n\r");
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/ a5 Q) h8 P: A _% S - printf(" --> \n\r");, T$ e6 `0 @7 |' U
- : t$ C& Y1 D X0 q
- while (CmdEnteredOk != 0x1) {' q, E3 H5 t# O
- ReceiveStatus = 0;
. }" r) t* O! D1 F - while (ReceiveStatus != 0x1){
7 e# I# ?" @+ z; l# y - /* Start the USART2 Receive process to receive the RxBuffer */! A+ q' @) V2 Y G9 |+ q
- if(HAL_UART_Receive_IT(&huart2, RxBuffer, RXBUFFERSIZE) != HAL_OK)
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5 N! b$ |: q& F% n - Error_Handler();
6 o& e3 F- v. j+ D+ i$ d/ G0 R - }
2 `( U& h) B8 R: a- r8 h* u* ] - while (!ReadyToReception);
7 C3 M2 l& d0 H5 _ - ReadyToReception = 0;
& h! R/ ~4 n3 t0 P) ^ - DecodeReception();
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- e1 \4 [& w2 w/ ] - CmdEnteredOk = 1;
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4 k7 O2 `5 a/ @, l- s = RxCommand;' s' S, ]0 @1 _! ]& B; C+ X
-
9 q# G" S3 Q/ {+ l+ N) B1 W8 [ - // __EFF_NENW1NW2 __ATTRIBUTES int strcmp(const char *, const char *);
& @% H0 e+ p+ e% m; Y - // strcmp(s, "x\r") ==0, input char is x\r, it is true
- c( I3 B4 h7 f" D -
- s* R3 F" T l2 e) e" g2 h - // TODO 5: If receive char "0", enter into Shutdown mode
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- . Q I. C# T, B# I. e
- // TODO 6: If receive char "1", enter into Standby mode
; r; R: B f4 w, [6 q -
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- // TODO 7: If receive char "2", enter into Stop2 mode
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- // TODO 8: If receive char "3", enter into Low Power Sleep. L% D+ {; _: [5 Z8 d
-
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- else {& Z1 b, @ x5 V0 w0 V' x/ \9 A
- printf("Invalid test number.. Please enter again\n\r");- x( Q& H; c% L8 `9 b. H
- CmdEnteredOk = 0;
5 s3 ]+ C0 e2 y- S, ^" t - /* Reset received test number array */( L: y( V% e+ _5 I6 h0 K, e/ A0 P
- memset(RxCommand, 0, RXCOMMANDSIZE);
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- }
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! V1 b6 {5 v; ?' F ~" Z5 x - /* USER CODE END 2 */( ]* Q" w q5 S. V$ Q
- # i8 @7 Z `. P, X5 L) O) B: T# J
- /* Infinite loop */4 ]# @$ N; u L0 o. h+ p
- /* USER CODE BEGIN WHILE */8 y4 D7 B& g7 @' G6 y3 s) O
- while (1)
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6 P5 v: o' o7 t3 c5 ^" l - /* USER CODE END WHILE */
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! h1 B0 L n2 [. h- /* USER CODE BEGIN 3 */
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- /* USER CODE END 3 */
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- /** System Clock Configuration
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- void SystemClock_Config(void) }1 M7 D9 Y( `. q& r% |0 ?" ]$ R8 K1 N
- {
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- RCC_OscInitTypeDef RCC_OscInitStruct;! X$ S1 b* ^. Z5 W1 r: q
- RCC_ClkInitTypeDef RCC_ClkInitStruct;* K% \5 ?' G. V) X' P8 n. J3 ~
- RCC_PeriphCLKInitTypeDef PeriphClkInit;0 h3 W: Q' z3 O* ?- `$ o5 E! k
- + \8 v" m/ A1 C
- /**Initializes the CPU, AHB and APB busses clocks
/ L3 _( m4 y( F, Y - */% d* \7 E, ? k( h/ d& l5 Z' P0 q0 x
- RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
* K. z& `% [# n2 b; \: ]6 s - RCC_OscInitStruct.MSIState = RCC_MSI_ON;/ S5 Y# ?: A% u8 A. c C4 B! @
- RCC_OscInitStruct.MSICalibrationValue = 0; E: _" n4 V8 B4 v: @* M
- RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6;+ g( F/ y* x$ i: Q
- RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;1 n i, J( E- r F6 s
- if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
$ w: z$ q; r9 g - {
: u4 Y5 L- A+ @ - Error_Handler();( Z/ w0 m* _1 t0 _
- }: G h$ d; T j! h( `) e
/ X* Y! J8 U9 y4 ~/ V- /**Initializes the CPU, AHB and APB busses clocks
% v# G5 c: K( I: O1 ^' [ - */! N/ R+ C1 \. q
- RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK0 ^- T. I& V9 G: M
- |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
# P' R9 E8 E+ ~ - RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;
$ \. c" S6 z( r6 A - RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;6 J/ U4 m) t: C
- RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
: \ m* O; b/ [5 a - RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;' A$ g' o$ H) s* E! E' V9 a" [* c% R
- 4 K# p6 b# m8 M
- if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)' m& {+ q" \4 J3 H2 [
- {
0 z( g2 S7 i; N7 i% y, ~0 r - Error_Handler();
{6 _" h9 t& N) G9 m - }
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- PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART2;
% @4 y: v/ ], w8 t w3 O) l - PeriphClkInit.Usart2ClockSelection = RCC_USART2CLKSOURCE_PCLK1;
[ Z( i+ u; x8 I5 B - if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK), b% L: l' c3 O. j
- {) z$ W2 {& l! {+ u o4 L
- Error_Handler();
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/ j1 v; q9 w9 }0 Q% ?3 F - ) `; Y! s. g9 l$ ~
- /**Configure the main internal regulator output voltage $ S2 K; ?' o/ k. w
- */
7 \; I/ o# k" S* U5 X - if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1) != HAL_OK)' s9 n; H* {9 J; k1 Z$ I
- {
" F3 X7 [$ \( o$ t9 m9 G - Error_Handler();' l | M9 M3 f0 |6 a; k, z/ y
- }
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% ] a4 ]" M0 [( k( m% c% W2 @- /**Configure the Systick interrupt time / G( t3 ?9 Z: l) W/ Q9 Q1 O
- */
6 y4 ]: d* k% Q/ b; f - HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
6 r, i' }( z: y. }; @% x6 O; T - 6 z4 d( O/ V: f7 i
- /**Configure the Systick - ~) F9 {8 S1 [1 W0 M' c
- */0 Z5 m ]+ S# k5 ?; q
- HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);4 ~) a3 @( {9 o( l
) ^, ] n' f% f1 M- /* SysTick_IRQn interrupt configuration */
/ R7 Q; N+ _; o8 t7 l - HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
+ k4 m/ {) \$ ` - }3 R9 A8 l ?& _
3 v0 p: h, F7 O. ~- /* USART2 init function */
8 J: H7 s5 z$ `6 ?" Z3 p - static void MX_USART2_UART_Init(void)3 r3 D5 ~ `- C
- {
- @2 f r0 ?: U' d; F
# o: q9 I" T2 A+ _3 R8 r- huart2.Instance = USART2;, Y- e8 w' A* r, ?6 J" V
- huart2.Init.BaudRate = 9600;
7 d5 ]! L$ Z: y9 S# l0 V4 d - huart2.Init.WordLength = UART_WORDLENGTH_8B;
' a8 \* ]0 _- K - huart2.Init.StopBits = UART_STOPBITS_1;
, |2 C& z: U: @; q - huart2.Init.Parity = UART_PARITY_NONE;2 S* B. m( j! l) c7 e7 A( E
- huart2.Init.Mode = UART_MODE_TX_RX;
' \; n1 B$ d0 { - huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;8 B4 o4 F8 P1 B) B4 O
- huart2.Init.OverSampling = UART_OVERSAMPLING_16;5 _! I; b" Y8 l% F* W/ i$ p- q
- huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
1 A1 J( h+ k1 P) D) N - huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;6 [/ a# H2 U M$ o' t" e
- if (HAL_UART_Init(&huart2) != HAL_OK)
; f; w5 s. F: r0 A' Q4 b - {. N& F9 U& {" Q7 `9 l% ~+ ^& N
- Error_Handler();! _0 ?% k7 ]4 j8 p
- }
9 x* d! l6 O9 U$ l
$ G) w' b$ f- x* }- }1 r) A \8 y' @) ^" b" d1 A5 u, B
- , \4 z4 \5 l) {" F1 o; [- t6 S& e
- /** Configure pins as
' H8 Q; d* |9 M4 X9 E/ J1 B - * Analog 4 Y( T! G# ^& G2 T: ~) d
- * Input 8 m7 i0 J$ x# q
- * Output! m8 G& Q) n h0 s# ~( J8 V- g
- * EVENT_OUT1 I* `% ]5 F, O9 u3 H
- * EXTI
8 }9 A) d6 {% p S T* W$ ?" V - */1 d. J/ y, s' K4 l" k6 |
- static void MX_GPIO_Init(void)$ W5 V. ?/ [4 t% U0 T0 Q
- {
7 G. i% I& a. k" L3 p( ~ - 7 e$ x0 x/ a: R1 J; k
- GPIO_InitTypeDef GPIO_InitStruct;/ `: ` {) b' {2 x: Y2 |
- ! N- F7 P9 Z0 ~& y- {* M8 b! k
- /* GPIO Ports Clock Enable */5 Z% E% h$ A5 z7 b T
- __HAL_RCC_GPIOC_CLK_ENABLE();
8 E" \ N( ^- e; A8 x. ?0 o G( t+ ] - __HAL_RCC_GPIOH_CLK_ENABLE();
5 F" {! t1 z! P* v7 U - __HAL_RCC_GPIOA_CLK_ENABLE();/ H/ s) Z0 O, q, D
- __HAL_RCC_GPIOB_CLK_ENABLE();& @/ {* x r9 V) R- h& `1 A- X
- & S6 I( ^5 Z2 \' d, E* W% F
- /*Configure GPIO pin : PC13 */
' ?4 w) z! Q- h$ p' e - GPIO_InitStruct.Pin = GPIO_PIN_13;
W. s- D W% Q9 e - GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
$ X8 s n( ^+ @0 U# G - GPIO_InitStruct.Pull = GPIO_NOPULL;
. X T& ]1 n( `8 p$ X/ I0 u3 V: w - HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);+ R0 y+ t9 y2 ~3 @" K! R; ]
; v4 i7 O8 U( b- }
/ w8 v; V [) ?5 {$ k - H3 y& A! g0 ?3 F& X8 V: ^) c+ f0 i
- /* USER CODE BEGIN 4 */
8 P2 l, q: V" ~% w, b0 l( D/ x - ) e! P+ [6 F6 {# e1 E/ v9 q
- PUTCHAR_PROTOTYPE
5 ^/ n) T5 D* Q7 | - {
/ ]) @: E& ?6 c% [ - /* Place your implementation of fputc here */
* r% H6 C% y! s/ g3 j+ U% ~9 b - /* e.g. write a character to the EVAL_COM1 and Loop until the end of transmission */ F! D# L+ W9 y( K$ d5 \0 D+ k
- HAL_UART_Transmit(&huart2, (uint8_t *)&ch, 1, 0xFFFF);
! ?6 [; x2 u- w0 G: E
, X% A) Y+ M( B, d- return ch;
' z. S. @' w! R `- g6 K% I - }5 Z: H: \* ~- f5 Y/ G4 g, E* e
- 3 W. w |: R$ C/ Y
- void DecodeReception(void)
& |' h$ A" H) |% G - {" N" ]! ?& {0 S1 Q
- /* Read one byte from the receive data register */
* G6 `- Z: S, D- A - temp = (char) RxBuffer[0];
) b8 o3 _: A8 O - RxCommand[RxCmdCounter++] = temp;$ ~4 B7 W. h/ m8 v+ y$ B- ^, ]3 l
) f( V- l; [$ N& f- { p* X- /* Check if is an LR/CR character */
2 _( @% h7 ?- m- e7 z - if ((temp == CR_ASCII_VALUE) || (temp == LR_ASCII_VALUE))
" |3 x6 p# B0 K! [ j9 X - {
) L7 P X! L7 a - /* echo entered command on terminal */% @5 n0 O7 L- |' C- \' W
- printf("You entered below test number:\n\r");: S! ^7 u5 R0 f. Z2 H K
- printf(RxCommand); @0 N) Y1 d- L* r' R$ R1 @
- printf("\n\r"); M( I7 o$ d. r3 n! x
- 2 a8 k5 d. u4 F$ t+ A
- RxCmdCounter = 0;
* Q- y$ a7 H' R- L F - " } f' q |# u& b i, o3 k" t3 f
- ReceiveStatus = 1;
# x5 r0 v* K9 l1 U/ s9 k, `! ` - }
' v, q7 g% Q& R1 y2 D) q - }
/ b0 d. x9 \- r) r8 J8 X, V8 [ - 4 K n. F. @4 f E0 S1 k
- void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart); ^2 a* _, P! O
- {
& s& x4 [8 z5 b6 \ - ReadyToReception = 1;
# C1 `& c3 e) u6 L - }, ` X$ A3 k( { V! a3 [
0 K- M) a* I6 i- void SystemClock_2MHz(void)0 }- f) p) ^8 U% Y( ~% G
- {' D- X0 ?. T: E4 |2 d
- RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; p: O) I% B' v0 {1 B7 S7 \
- RCC_OscInitTypeDef RCC_OscInitStruct = {0};
2 {/ T) Q& h' X. I' l! ] - 9 X3 g) ? r/ B# a9 c# u! U
- /* MSI is enabled after System reset, update MSI to 2Mhz (RCC_MSIRANGE_5) */
+ w. W- }" T* @# d: _1 N. H - RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
2 G" ^; R; p; H1 t4 P1 s - RCC_OscInitStruct.MSIState = RCC_MSI_ON;
6 `# S7 Y& v$ k0 } - RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_5;6 _; c4 W$ l7 h
- RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;1 f6 G$ A' t' i8 E' F3 G
- RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
6 W8 ^) g- o& u3 k: n' @ - if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
( x b' o, {3 Z" d2 W8 ` - {
5 A1 y& `. J @& c - /* Initialization Error */+ b: ~( `6 [, `: A
- Error_Handler();$ h" ^% y7 a; f# p7 M+ ?: S: G
- }
% _8 q& U2 A |) z! z -
3 b, @8 K, \/ e/ K - /* Select MSI as system clock source and configure the HCLK, PCLK1 and PCLK2 # F X; Y5 ^" u
- clocks dividers */$ Y1 d, Q1 s! x$ ?! u
- RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK;$ }2 g/ d+ ]2 w2 f O
- RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI; 3 Y4 f1 Q& g' e: g( c) h7 G1 F/ E% r2 ]
- RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;1 m# R3 W- d0 Z( r. B
- RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
- H( t- R- P6 x" _4 z - RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;9 S; d7 f; a6 F2 }% ]
- if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)# Z4 v4 I7 i' m* r* F
- {2 g9 u5 g4 m3 M; |& Q; C O- W
- /* Initialization Error */
/ v/ u5 E' f" s3 ` - Error_Handler();
9 h, X2 \+ \: e8 | - }: L# {, V6 h2 V& z3 F
- $ a0 ]1 m, ^: L" p( ]6 A% [
- }
7 V3 E% l5 d6 N4 ]* t - - }' b3 v5 N5 A1 [; l/ E+ f
- void GPIO_AnalogState_Config(void)
( t8 s7 {( S+ \* D - {3 ?- k8 H1 u4 i3 x
- GPIO_InitTypeDef GPIO_InitStruct;
" r9 r" Z0 s* u( Q$ _$ k# E -
) l! p8 f7 a+ x6 I7 ~4 C7 s - /* Set all GPIO in analog state to reduce power consumption, */
' ^4 A O, D' ?% m, [ -
4 [& t. y% F' @5 c6 n$ j; E1 e - __HAL_RCC_GPIOA_CLK_ENABLE();, y8 x2 O) y% l: r" |5 }
- __HAL_RCC_GPIOB_CLK_ENABLE();
3 `2 }6 c! b+ d- Z - __HAL_RCC_GPIOC_CLK_ENABLE();
: h' A2 }& I0 w - __HAL_RCC_GPIOD_CLK_ENABLE();
; r0 h2 |8 b8 r4 V, u ? - __HAL_RCC_GPIOE_CLK_ENABLE();
( C, x/ U+ U8 P- |! `. Z \ - __HAL_RCC_GPIOF_CLK_ENABLE();
) Q, ]3 w+ B \( E" t8 L - __HAL_RCC_GPIOG_CLK_ENABLE();
+ [5 J7 Q1 K" O% T* G3 t - __HAL_RCC_GPIOH_CLK_ENABLE();
1 ]5 J$ y- U2 N' B9 a+ [: R s1 v - & Q9 o( y* }! M- i! p4 l: {0 x% b
- GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;- e6 x z) o+ I: P% [
- GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;+ Q% K6 q$ t- D3 `! g
- GPIO_InitStruct.Pull = GPIO_NOPULL;
( Z+ h! l5 L3 @( e0 ] - GPIO_InitStruct.Pin = GPIO_PIN_All;
+ I2 _& ~- A: ^; U3 l2 T. d1 y& v
* {8 P8 D! f5 z) w5 x2 p4 N- HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);, h* T9 U# W4 G5 t9 l- \
- HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);7 P) Y# M! i4 `$ q9 \4 R }) M3 {
- HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
* p' U4 O8 ^" R - HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);! d# l) K6 o* r: m) c
- HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);; L {. n' X7 ]7 }0 N# ]+ p
- HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);, Z: C ^6 v9 r b
- HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);
1 t( U( `! ^' x$ s - HAL_GPIO_Init(GPIOH, &GPIO_InitStruct); ( x, u& X( S; n: b- a
- - z# u( O, e+ C+ Q6 |
- __HAL_RCC_GPIOA_CLK_DISABLE();
8 }) ]/ E/ r' ~( B" a/ {' v% ? - __HAL_RCC_GPIOB_CLK_DISABLE();
0 d: Q3 T" K( ~$ O4 T9 D* s- z" _: W - __HAL_RCC_GPIOC_CLK_DISABLE();
% ^: v8 s1 j. P. i2 ?$ z1 X1 } - __HAL_RCC_GPIOD_CLK_DISABLE();# G0 W. {* ]4 i# ]6 ]2 T5 C
- __HAL_RCC_GPIOE_CLK_DISABLE();/ y& ]* g1 X0 d' F. y5 D% K$ G; h
- __HAL_RCC_GPIOF_CLK_DISABLE();0 Y1 p% O! r" ]2 ~2 n9 P
- __HAL_RCC_GPIOG_CLK_DISABLE();/ L2 s. v7 a8 @; o
- __HAL_RCC_GPIOH_CLK_DISABLE();
& c) r: [! G# r1 p. } - + V3 l& _% c7 X2 ?& E1 r* `
- }+ i2 h( E1 |7 E# Y9 G* E! G
- ! g8 {/ N! b( R E+ X
- void LSE_OFF_Config(void)" d' Q. N% L9 `
- {
a) j5 m3 p; ?9 K - RCC_OscInitTypeDef RCC_OscInitStruct = {0};8 r( i. Y# x+ |/ D" F# g- d( e
- ' @2 v* U" u$ f* D
- /* set LSE OFF */
5 ?7 ^% z0 r% o1 f& e) Q - RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;
6 i+ y2 F% A* ~' t9 r% V - RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
( x% m+ x; n8 R/ h, O5 N2 f! t% _ - if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)+ R2 Y! @# p! c. }
- {
" O5 a2 U( J" J! q6 R - /* Initialization Error */ h; k8 V+ F) y8 ^% Q
- Error_Handler();
3 ], u( Q7 X4 @3 y5 a - }
) P4 c$ e% [0 g) C( w) J7 Q
/ J9 _& g6 t2 W- }& M1 ^" F7 l. a& R+ r9 \3 c# j: k
- 0 Y& T$ @' R% [
" B+ P. j8 F4 u5 Z* c9 P- // TODO 1: Enter into Shutdown mode+ P/ K0 f/ Y3 z0 f7 f& H8 B
p* K# o' J+ H* ]- ; ^9 h- V2 y; u3 ]* w
- // TODO 2: Enter into Standby mode" _, u3 I; j; Z; n' A3 O
- ! h% ~$ T" G+ }- s
- 9 j' h/ i* ~3 i$ d, r$ T8 [
- // TODO 3: Enter into Stop2 mode
/ v/ C$ a+ m0 M1 Z @
& k8 i/ F0 N" B N- H, A g) K
9 {0 U( b5 D- e8 w7 l( M) _2 ~- // TODO 4: Enter into Low Power Sleep mode
. }. o9 c3 v7 L! ]3 C2 C- U
* s2 ]' n) d' {" ^- 0 n4 `( |1 V( P5 q' v- W2 Q' T! h
- : x0 A) B1 U7 Y& c6 F: J
- /* USER CODE END 4 */0 l% } ]. @! d+ A5 i
2 F+ L& c; u4 A+ R8 n- /**
. O( _+ G. p# |( r! { - * @brief This function is executed in case of error occurrence.# [& D& q: Y) n/ _+ B* r- g0 E" H; d
- * @param None
% i. ?% t4 w* ~" y( ? - * @retval None( P3 g, n P' l/ ~$ o/ d: R r$ j, U
- */
; Z* U' ?4 `0 { - void Error_Handler(void)
9 L' e+ E6 }0 F7 M3 b - {' I9 x" i* L0 `* Q( I1 c
- /* USER CODE BEGIN Error_Handler */
3 D- ^6 ^, k" n8 B2 f, C - /* User can add his own implementation to report the HAL error return state */% S% L P5 c5 e2 }3 z! z
- while(1)
7 R! l$ U ~# I; G$ i - {
3 d' t* |/ ]8 @: E! S; x5 C - }
* ? w m% T0 [7 _ - /* USER CODE END Error_Handler */ 7 S5 s$ y1 B* j% ]. i% J) m
- }
4 G7 X/ w3 o+ H' j
( B6 z4 i- i/ q5 g3 [0 S% K- #ifdef USE_FULL_ASSERT; R, `" }* V) A1 b
; G @0 ^0 j! k, V3 X$ O5 V- /**
. H9 V2 r% J S - * @brief Reports the name of the source file and the source line number n% j" @$ z7 T+ U& o$ g- N
- * where the assert_param error has occurred.
. x6 {. P& Z8 u6 Y( ?0 X/ Q2 v - * @param file: pointer to the source file name
5 ]7 Y% U7 T3 U- S+ g - * @param line: assert_param error line source number) _ M E& Z" m4 d
- * @retval None; D% y$ R4 J4 Y1 P+ [ [' z6 `
- */
" w* @( T- _ Q+ T - void assert_failed(uint8_t* file, uint32_t line)% o# O5 |1 a* s) j9 x1 s
- {# e0 w, j$ \9 l; ~' }
- /* USER CODE BEGIN 6 */9 l" P" B* ^: `
- /* User can add his own implementation to report the file name and line number,
3 w- w3 s! y' a3 T" r& a$ v - ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) *// ~" E, ]$ O% ~% W% d. c
- /* USER CODE END 6 */
8 T( U( d7 A z5 B3 z9 ^ - & h% z: d' M1 ^* W) ?& j, g/ p
- }
/ f) k. n% c& a
& y3 x& u/ g' i5 }. m5 u- #endif3 Q; h& t t; H ^. p8 V$ L
/ f' a9 c" [9 ~% K1 |; ^- /**
# b0 q9 [# s( L% d4 ?6 _' l - * @}' [* r* m: `/ s5 t& u( f
- */ # `& t0 B5 s$ Y; F( z
3 b( j! H {+ T; G# e- /**
7 ~( W' B7 B9 x, {- p4 n0 j: j0 Q - * @}4 B% q8 [. a, G# y+ z
- */ 3 u6 }+ {8 a+ j. \& f
8 A5 |1 \& Y& |+ L) a5 C- /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
5 t( g' v# {% [! P+ h, d( m+ B5 W
复制代码 上面是修改之前的代码。
% j5 k" h# j+ y; g* G9 ?' y1 x我自己测试的结果是(图上红色的数字是我的测试结果,与理论值基本吻合):
6 I% d L+ i( j2 q
5 B a1 n* f2 g, j
4 F4 V3 K; ?5 x7 @/ ?+ p/ Y
大家也可以根据帖子里共享的ppt思考一下补全代码。0 q+ H9 S: E' I8 h! T
% H# ]: w" b1 q; }2 |& u
总之昨天学到了以下东西:& W7 o( U; a% }0 `: v5 Q7 j& N
1、知道了设计低功耗产品时,硬件层面和软件层面各应该注意什么) h v3 y4 Y( l* m1 y; ^5 \
2、能够使用CUBE MX配置工程并生成项目代码
$ w2 B3 R% ]$ J; k: `: s! O3、计算理论功耗,测量实际功耗并对比 N {) p/ U L" K( x
! q6 g9 |- M1 @" \& |5 m) G
收获满满的一天,下面把学习的资料分享给大家:+ g! A- r% y; k+ m; }2 c- _8 N
+ ?; a5 y4 o' s
* ] N Q7 ~, l1 N3 G S1 A( z
4 n% f' D3 A8 t
00_Part0_20170516_Xi'an_MassMarket_Begin.pdf
(1.22 MB, 下载次数: 193)
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哦,刚才终于找到资料了,不用麻烦了
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谢谢支持,以后多多交流
3群的网友哦!
我之前在上海的时候参加过一次,现在在西安